Your initial statement about having reduced xp rates was fine. It would slow down initial training enough. Like lvl1-20 90% reduction, 20-35 75%, 35-50 65%, etc. The issue now, we have no incentives to kill higher level monsters, cause they all have 50xp/1000lp. We'd just sit at low level mobs with higher hp, and won't go outside that. You need to remember that people will look to train this skill efficiently and fast to level up to go use at the content they love, and learn more about it then. The issue with all mobs with 50xp/1000lp, it doesn't factor quests required, slayer level, mobs defence level, which impacts hit chance. In the current game, without these changes, we'd go kill low level mobs, where we have high hitchance, and as we progressively level, go fight high level monsters which gives better xp rates. This is just a natural progression. With these cb changes, we'd go find a low level high hp mobs and camp there for levels. People won't venture and kill other mobs.